body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background-color:#f5f7fa;margin:0;padding:20px;color:#333}.container{max-width:1000px;margin:0 auto}header{text-align:center;margin-bottom:30px}h1{color:#007acc;margin-bottom:10px}.converter{background:#fff;padding:30px;border-radius:12px;box-shadow:0 4px 10px rgba(0,0,0,0.05)}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-bottom:20px}.form-group{display:flex;flex-direction:column}label{font-weight:600;margin-bottom:6px;font-size:14px}input,select{padding:10px;border:1px solid #ccc;border-radius:6px;font-size:15px}button{background-color:#007acc;color:white;border:none;padding:12px 20px;border-radius:6px;font-size:16px;cursor:pointer;transition:background-color 0.2s;margin:10px auto 0;display:block;width:200px}button:hover{background-color:#005ea2}.results{margin-top:30px;display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:20px}.result-box{background-color:#fff;padding:16px;border-radius:8px;box-shadow:0 2px 5px rgba(0,0,0,0.06);display:flex;flex-direction:column;justify-content:space-between}.unit{font-weight:700;color:#007acc;font-size:18px;margin-bottom:6px}.copy-btn{width:100%;background:#007acc;color:#fff;border:none;padding:6px 10px;border-radius:4px;font-size:13px;align-self:flex-end;margin-top:10px;cursor:pointer}.copy-btn:hover{background:#005fa8}#alertBox{position:fixed;top:20px;left:50%;transform:translateX(-50%);background:#4caf50;color:white;padding:12px 20px;border-radius:8px;box-shadow:0 4px 8px rgba(0,0,0,0.2);display:none;z-index:9999}.percent-to-px-card{border-left:4px solid #4CAF50}.px-to-percent-card{border-left:4px solid #FF9800}footer{text-align:center;margin-top:30px;padding:20px;color:#666}footer a{color:#007acc;text-decoration:none}@media (max-width:500px){button{width:100%}}